… process. Position/z-index/visibility properties are now built into a single CSS string and applied directly in the initial markup, or all at once as cssText in subsequent updates, which should make both faster. Also fixes issues with visibility not getting updated at proper times. Respond to style.* changes on watched ancestors.

…wsers (namely Gecko) are starting to honor the spec and treat gradients as having no intrinsic aspect ratio, making gradients expand to full width if the second value is empty. See https://bugzilla.mozilla.org/show_bug.cgi?id=706121 -- thanks to David Carson for the heads-up.